<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        function Person(name,age) {
            this.name = name;
            this.age = age;

            return 1
        }
        Person.prototype.do = function () {
            console.log('学习 react');
        }

        
        function myNew(consty, ...arg) {
            
            const obj = {};

            const re = constr.apply(obj, arg);

            obj.__proto__ = consty.prototype;

            if (typeof re === 'object' && re !== null || typeof re === 'function') {
                return re;
            } else {
                return obj;
            }
        }

        const p1 = myNew(Person, 'DIO', 18);
        console.log(p1,'p1');
    </script>
    
</body>
</html>